Python loops that might terminate

thread_kill run

(base) 530-tmp % python thread_kill.py
[1, 2, 3, 4, 5, 1]
[1, 2, 3, 4, 5, 1, 2]
[1, 2, 3, 4, 5, 1, 2, 3]
[1, 2, 3, 4, 5, 1, 2, 3, 4]
[1, 2, 3, 4, 5, 1, 2, 3, 4, 5]
[1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1]
[1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2]
[1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3]
[1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4]
[1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5]
[1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1]
[1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2]
[1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3]
[1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 1, 2, 3, 4]

thread_kill.py

import threading
from time import sleep

items = []
def killer():
    global items
    sleep(0.00008)
    for _ in range(1_000_000):
        items[:] = []

threading.Thread(target=killer).start()

items = [1,2,3,4,5]
for item in items:
    items.append(item)
    print(items, flush=True)